Latter is not a specific stage or element name. Bulk or raw iron oxide has iron and oxygen in nonstoikiometric ratios between wustite, magnetite, hematite, and maghemite.
We know that iron (Fe) and oxygen (O) make up iron oxide. (There is more than one oxide of iron, by the way.)
No elements are made up of a compound. I think you mean 'Which elements make up iron oxide?', and the answer to that is iron and oxygen.
Iron and oxygen
Iron works well with carbon and other metals. but i have no idea what they make.
Iron reacts with oxygen to form iron oxide. The chemical formula for iron oxide is Fe2O3 (rust) or Fe3O4.
To make iron sulfate, mix iron oxide with sulfuric acid. For iron hydroxide, mix iron sulfate with a strong base like sodium hydroxide to precipitate out the iron hydroxide. Iron oxide can be made by heating iron metal in the presence of oxygen.
oxygen
Iron oxide or rust
Magnesium oxide and Iron
Iron oxide is a chemical compound made of iron and oxygen. It exists in two main forms: Fe2O3 (iron(III) oxide, or hematite) and Fe3O4 (iron(II,III) oxide, or magnetite).
Carbon monoxide reacts with iron oxide to produce iron and carbon dioxide in a process known as reduction.
Calcium (Ca) and Oxygen (O) are the two elements that make up calcium oxide.